I'm planning on this right now, still looking for a vendor to run this. Not sure if we would hit the 150 number.
I would be buying multiple sets, at least 1 of all the different colors, and I would wager a lot of people will also do the same thing so they have a space that either matches or at least goes with the vast majority of sets.
Quick question while you're paying attention. You mentioned the VE.A in the title and that you would have 1x 2.25u, 1x 2.75u, and 2x 2u keys but the VE.A takes a 1.75u spacebar and the other longer key on the bottom is a 1.5u (I think). Would there be a possibility that you'd consider adding one of each of those? I am in this mainly for the VE.A, which I will be using the GMK sets on, and would absolutely LOVE proper sized blanks to fit the space bar, at least, in multiple colors (black, Dolch greys, beige, and some bright colors like cyan and purple like you mentioned in the OP).
Also, would the beige or grey colors match, or at least come close to matching, the GMK Carbon set?
Sorry for the long post, I am somewhat new so a lot of what may be obvious to the veterans flies completely over my head!